Fix readme

README.md

@@ -20,7 +20,7 @@ Use [isobject](https://github.com/jonschlinkert/isobject) if you only want to ch
 import isPlainObject from 'is-plain-object';
 ```
 
-**true** when created by the `Object` constructor.
+**true** when created by the `Object` constructor, or Object.create(null).
 
 ```js
 isPlainObject(Object.create({}));
@@ -31,6 +31,8 @@ isPlainObject({foo: 'bar'});
 //=> true
 isPlainObject({});
 //=> true
+isPlainObject(null);
+//=> true
 ```
 
 **false** when not created by the `Object` constructor.
@@ -44,8 +46,6 @@ isPlainObject([]);
 //=> false
 isPlainObject(new Foo);
 //=> false
-isPlainObject(null);
-//=> false
 isPlainObject(Object.create(null));
 //=> false
 ```